added opengraph metadata mechanism
switched pageData to include URLs
added site logo image, favicon, further opengraph implementations
added stripped entry lede and article descriptions
added twitter cards
added image field to entry model
entries now have as their open graph image the entry image if it exists
first try at timezones thing ... kind of crude, consider taking out of pagedata
removed timezone from page data, fixed rendering for archive
last of timezone fixes ironed out
Added timezone support to entry parsing and display, uses now the TZ environment variable.